#include <stdio.h>

int main()
{
	int decks;
	
	puts("Enter a number of decks:");

	scanf("%i", &decks);
	
	if (decks < 1) {
		puts("That is not a valid number of decks");
		return 1;
	}

	printf("There are %i cards\n", (decks * 52));
	return 0;
}
